Valve.



H. D. SNELL.

VALVE.

APPLIOATIUI FILED APB. 30, 1905. 899,079, Patented Sept. 22, ;9o&

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y J5 1 1 7J4 jzf 7 4 HENRY D. SNELL, OF MAWRGLEN, PENNSYLVANIA.

VALVE.

Specification of Letters Patent.

fatented Sept. as, 1908;

Application filed April 80, 1908. Serial No. 430,151.

tion wit-h the steam c est of an "ordinaryshde valve engine. l6

My invention consists in certain novel arrangement of parts and combination of details.hereinafter more fully set forth and claimed. In the drawingsz-Figure 1 is a longitudinal section through an enginecylinder and steam chest showing my valve in position.

Fig. 2 is a transverse section through my valve casing and valve. Fig. 3 is a lorigitudinal section of the same. Fig. 4 is a side elevation of a modified form of m valve. Fig. 5 is a partial end elevation of t 1e same.

Similar numerals of reference are employed to indicate corresponding arts throughout the several figures of the raw- Inga.

The numeral 1 indicates the cylinder of an engine having thereon a steam chest 2 pro vi ed with a cover 3. The steam pipe 4 affords means for the admission of steam in the steam chest 2. A valve stem 5 asses through a bushing 6, and is actuated in an of the usiial manners to reciprocate throng said bushing. I provide in my 5 ecial form of valve a casing 7 preferably bo ted as at 8 to the cylinder l. The casing 7 is provided with steam ports 9 and steam passages 10 which are so arranged that the ends of said passages 10 will be in 'alinement with the steam ports 11 of the cylinder 1. The casing 10 is further provided with an exhaust iort l2 connecting with exhaust passage 13 o the cylinder 1. In this casing 18 mounted a rotary valve 14(provided with steam passages 15 so arrange that when one passage is "1 position to connect steam port 9 and steam passage 10', the other passage will connect steam assa ge 10 with the exhaust assage 12. T is valve has mounted on t. e end thereof, rocker arms 16 which preferably have their ends extending over the casing, as shown at,l7 and serve to hold the valve in position in the casing. On the valve stem 5 IS mounted a yoke 18 and the rocker arm 16 is connected with the yoke 18 by rocker bars 19.

In the 'form of my device shown in F' 4 and 5 the rocker arm 16 is replaced by a l ate 20 having a pin 21 thereof, and securely boltcd to the valve as at 22.

In the operation of my device, steam being admitted through the pipe 4 by o ning a valvenot being necessary here to ustrate,

it-passe through one of the steam ports 9,.

the steam passage 15, passages 10 and 11,-

and into the cylinder. .The exhaust steam from the o posite end of the cylinder passes out throng the passages 11, 10 and 15 on the op osite side of the valve and throu h the ex iaust passages 12 and 13. It'will be observed that with this form of rocker valve by reason of its being entirely surrounded by steam, any leakage due to wear is rendered inocuous. It will further be observed that at any time that it is desired to remove my valve for repairs of any sort, the steam chest may be opened, the entire valve and easing wit drawn therefrom, repaired and re lace with great ease and convenience. t will still further be noted that should it be necesse or advisable to convert the ordinary slit e valve engine into a rotary valve all that will be required is one of my valves, which will be arranged so that the ports It) and 12 come opposite the ports 11 and 13 in the old steam chest and need simply to be bolted in position, the same valve stem being adapt able to be,used in connection therewith.

1. In an en 'inc, a steam chest, a valve casing dctachab y mounted therein, a rotary valve held in said casing, a retaining and rockiru member secured to each end of said valve lying'and bearing against the ends of said casing, a valve stem, a yoke mounted on said valve stem, and rods connecting said rocker arms with said yoke.

2. In an engine, a steam chest, a valve cas- In tvc-stimony that I claim the fomgoihg as my own, 'i have hereto afiixml my slgnature in the presence of two witnesses.

.IIEN HY .D. SNELL.

in detachubly mounted therein, a rotary Va ve hold in said cnsing, a pair of rocker arms secured to said valve and ha ing their ends overlving and bearing against the ends 5 of said. casa ng, a valve stem, a. yoke mounted Witnes.

on said valve stem, and rods connecting said DA-vn) T EH1! E, rocker arms with said Jmm McBRmn.

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